NTE NTE1502 Datasheet
NTE1502
Integrated Circuit
5–Step LED Driver Circuit
for Linear Response
Description:
The NTE1502 is an integrated circuit in a 9–Lead SIP type package designed for driving 5–LED bar
graphs or dot displays so that the LEDs may light linearly for input signal. Brightness of the LEDs can
be controlled by using the output current adjustment pin provided.
Features:
D 5–LED Bar Graph or Dot Display Drive
D Linear Response with Respect to Input
D Brightness Externally Adjustable
D High Output Current, Suitable for Green LED Drive
D Lamp ON/OFF Hysteresis, No Flickering by Noise
Absolute Maximum Ratings: (TA = +25°C unless otherwise specified)
Supply Voltage, V
Circuit Voltage, V
Load Current Set Input Voltage, V
Output Voltage (Note 1), V
Supply Current (Note 1), I
CC
8–5
7–5
O
CC
Load Current Set Input Current (Note 2), I
Output Current (Note 1), I
Power Dissipation (TA = +75°C ), P
O
D
Operating Ambient Temperature Range, T
Storage Temperatuere Range, T
stg
7
opr
–0.5V to +18V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
–0.5V to +16V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
+16V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
–0.5V to +16V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
18mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
20mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
550mW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
–20° to +75°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
–55° to +150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Note 1. Output Pin1, Pin2, Pin3, Pin4, and Pin6.
Note 2. I7 which can be set IO = 20mA is assumed to be the absolute rated value.
Electrical Characteristics: (TA = +25°C, VCC = 16V unless otherwise specified)
Parameter Symbol Test Conditions Min Typ Max Unit
Input Voltage (LED ON)
LED 1 V
LED 2 V
LED 3 V
LED 4 V
LED 5 V
I(ON)1
I(ON)2
I(ON)3
I(ON)4
I(ON)5
1.63 1.83 2.00 V
2.20 2.43 2.64 V
2.80 3.03 3.27 V
3.38 3.64 3.88 V
3.92 4.14 4.37 V
Electrical Characteristics (Cont’d): (TA = +25°C, VCC = 16V unless otherwise specified)
Parameter Symbol Test Conditions Min Typ Max Unit
Load Current
Pin6 I
6
Pin1 to Pin4 I1 to I
Pin1 to Pin4, Pin6 I1 to I4, I6VO = 16V, I7 = 4.25mA – 16 19 mA
VO = 1.2V, I7 = 4.25mA 13 16 – mA
VO = 2.5V, I7 = 4.25mA 13 16 – mA
4
Input Current I
Supply Current I
8
9
V
= 8.5V – – 50 µA
8–5
V
= 16V – – 5 mA
8–5
V
= 16V – – 18 mA
8–5
Output Pin Leakage Current I1 to I4, I6VO = 16V – – 15 µA
Pin Connection Diagram
(Front View)
9
V
CC
Input
8
Output Current Adjust
7
6
LED 5
GND
5
4
LED 4
LED 3
3
LED 2
2
LED 1
1
.929 (23.6) .118 (3.0)
.236
(6.0)
19
.098
(2.5)
.100 (2.54) .118(3.0)
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